Mitsubishi Eclipse Workshop Manual page 153

o
o
FUEL
-
On-vehicle lnspection
of
MPI
Components
13-85
Hint
4:
lf
the injector
harness and individual part checks have resulted normal but the injector drive
time
is
out of specification, the following troubles are
suspected.
(1
)
Poor combustion in the cylinder
(f
aulty ignition plug, ignition coil. compression pressure,
etc.)
(21
Loose
EGR
valve seating
(3)
High engine resistance
INSPECTION
Using Multi-use Tester (MUTI
o
O
NOTE
'r:
The
injector drive
time
refers
to when
the_supp]y_ y_oltqg.e
is
1
1 V and the cranking speed
.is
less
than.250
rpm.
'2:
When'coolant temperature is lower than
OoC
(32'F), injection is
ma_dg
by
fotlr
cylinders simuhaneously.
*3:
When the
vehicle
iö
new
[within initial operation of aboüt
500
km
(300
miles)!.
the injector drive time may
be aboul
10% longer.
o
o
o
o
Waveform inspection
with
analyzer
7rul20l
Analyzer
@
illtrüblshi
ilotorr
C,orporrtlon
Apr.1991
,$
Measuring method
(1)
Disconnect the connector of the injector, and connect the'
special
tool
(iest harness: M8991348)
across
the discon-
nected connector
parts.
(Connect the tool
to
the
terminals
on
both
the power
öüpptv
tiO"
and the engine control unit side.l
tZ) Connäct the special
paüerns pick-up of the analyzer
to the
clip of the tesi
harness
on the engine control unit
side.
:
'
i.
,:
i.'1
'
'ri
Function
Item
No.
Data display
Check condition
coolant
temperature
Standard value
Data reading
41 Drive
time'r
Engine: Cranking
ooc
(32oF)'2 Approx.
15
ms
20"c (68'F)
Approx.
25
ms
SO.C
(176oF)
Approx
9
ms
Function
Item
No.
Data display
Check condition Engine state
Standard value
Data reading
41 Drive time'3
o
Engine coolant
temperature: 8O to
95'C
(176 to
2O3"F)
.
Lamps. electric
cooling
fan,
accessory units: All
OFF
.
Transmission: Neutral
o
Steering wheel:
Neutral
85O
r/min. (ldle)
2.2-3.4
ms
2.OO0
r/min. 1.7-2.9
ms
When sharp racing
is
made
To
increase
Function
Item
No.
Drive content
Check condition
Normal
state
Actuator test
01
No.l
injector shut off
Engine: ldling after
warm-up
(shut off the
injectors
in
sequence
during
after engine
warn-up,
check
the
idling
condition)
ldle state
to
change
further (becoming
less
stable
or
stalling)
02 No.2 injector shut off
03 No.3 injector shut off
04 No.4 injector shut off
PWUE90i0